CD duplication is process of transferring digital information on blank CDs from original CD-r source by burning blank CDs. CD duplication is also known as CD burning and CD copying. CD burning is optical disc authoring which means recording source material onto optical disc (CD or DVD).

CD duplication is process of transferring digital information on blank CDs from original CD-r source by burning blank CDs. CD duplication is also known as CD burning and CD copying. CD burning is optical disc authoring which means recording source material onto optical disc (CD or DVD).

CD duplication is DVD/CD copying service which is done when low volume of discs are required or discs are required within the time frame which is not suitable for replication.

Data-video, audio, games or software is recorded on disc in sessions. Every session consists of lead-in including table of contents and lead-out. The table of contents (TOC) is area which describes layout of tracks. It is located in lead-in area of disc session. Lead-in area of CD session is starting part containing TOC and address of free part od disc available for next session. Lead-out is ending part of CD session which is 6750 sectors long. Tracks are set of sectors on disc containing block of data.

An optical disc can be created using CD duplicator, CD burners, CD recorders and other hardware available in market.

A CD duplicator is a hardware which helps short run CD duplicating. A number of companies have flooded the markets with CD duplicators. A 7 tower CD duplicator can produce 7 CDs per 4 minutes. This hardware is ideal for copying data, audio, video, software, games and corporate presentations on multiple CDs. A number of cheap duplicators available in market make it possible to create, produce and distribute data in market.

Firstly a disk image is created for optical disc with full file system. Disc image is single file stored on hard drive which is burned to the disc. Creating disc image is time consuming and most of programs burn in single bundled operation. The packet writing applications burn CD without writing entire disc and work in parts at time just as floppy disk. Optical disc authoring technologies are processes which prevent errors. Some optical disc recorders require software called burning applications or burner applications. Software is sold along with recorder and few operating systems as Linux come bundled with them. Windows XP also includes in built support for CD burning, CD-R and CD-RW drive.

ISO 9660 is optical disk file system common for CDs. Universal Disk Format (UDF) allows deleting, creating and modifying files for DVDs.

Some of the most common CD burning software is Nero, Roxio, Express, and DeepBurner.